Github user revans2 commented on the pull request:
https://github.com/apache/storm/pull/318#issuecomment-74683011
We put in some changes so the storm build now uses a plugin that is also
built as part of the build. This makes it so you cannot run ```mvn compile```
on its own any more, you need to run at least ```mvn package``` because needs a
jar on the classpath. If you plan on building in just storm-core you need to
have installed the plugin into your local repo first. We are working on a way
to fix this, but don't have a perfect solution yet
https://issues.apache.org/jira/browse/STORM-639.
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